Sure, it's possible to automate to that point (and it can be fairly inexpensive if you DIY). You'll need to know frame/finish carpentry, household plumbing, 120VAC~240VAC wiring, and how to build/program a PLC. If you had this knowledge up-front, you probably wouldn't be asking the question.
What I'd like to know is for what reason you'd want/need to build such a grow. If you're a patient with mobility issues, I'd suggest finding a more accessible area (or a good caregiver). Cannabis (indoors) is rather more "hands-on" than you seem to think. Even with the best camera money can buy, it would be difficult (if not impossible) to spot pests/disease and nutrient deficiencies before they've destroyed the entire crop. So, yeah, good luck with that.
EDIT: Holy crap! During the time it took me to compose this post, other people wrote the same crap I was thinking (often using identical phrases)... That's funny.